Grinding-machine.



H. A. BOXILL.

GRINDING MACHINE.

APPLICATION FILED APR. 9. 1915.

.magP

Patented Jan. 25, 1916.

/WI u I N I P H. A. Boxl'LL.

GRINDING MACHINE.

APPLICATION FILED APR.9.1915.

1,169,23L Patented JmL-25,1916.

4 SHEETS-SHEET 2.

H. A. BOXILL.

GRINDING MACHINE.

APPLICATION FILED APILS, 1915- 1,169,231 A Patented Jan. 25, 1916.

4 SHEETS-SHEET 3- H. A. BOXILL.

GRINDING MACHINE.

APPLICATION FlLEn APR.9. 1915.

Patented Jan. 25, 1916.

4 SHEETS-SHEET 4.

Mffff HAnoLn A. BoxIIQL, oFcINcINNATI, omo.'

. GRINDIuG-MACHINE.

ToiaZZ whom t may concern Be it known that I, HAROLD A. BoXILL,

a subject of the King of Great Britain, re-

siding at Cincinnati,""county of Hamilton,

.and Stateof Ohio, have invented certain -Anew and useful Improvements in Grinding- Machines; and I do hereby declare thatvthey following is a full, clear, and exact description thereot'l My invention relates to that class of grinding machines especially adapted for grinding engine cylinders and in which a grinding member is simultaneously rotated and revolved around the axis of the cylinder in contact witlrthe' wall and fed longil tudinally thereof. v

One object of the invention is to provide simple and efficient means for eecting these and rotating the grinding member withoutl moving it longitudinally.

Anotherf object of the invention is to provide a structure wherein the grinding wheel spindle and its supporting and actuating parts are moved longitudinally as a unit whereby the rigidity of the spindle is maintained throughout its travel along the wallr of the cylinder, and chattering of the grinding wheel is entirely eliminated.

' The invention consists. in the construction, combination and arrangement of parts as hereinafter described and claimed. .f

In the yaccompanying drawings-.Figure 1 is a longitudinal vertlcal section vof a mak chine embodying my invention. Fig. 2 ,is a side elevation seen from the left of Fig. 1.

Fig. 3 is a top view, with the gear cover and grinding motor removed.'I Fig. 4f is a detail sectional illustrating a centering device. Figf is an enlarged vertical section of a current collector for the grinding motor. 'Fig 6 isa perspective view of .the support for thelatter. Fig. 7 is a plan vlewrv of the current` collector with the4 cover removed. t i,

1 designates a. cylindrical housingv adapted to be accurately alined on a separate base member 2- b means of male' and female flanges 3, 4, orrhed on vthe housing and base Specification of Letters Patent. 4

` respectively, said iianges being connected by bolts 5.

Journaled inthe housing 1 and projecting through both the housing and baseis a cylindrical sleeve 6 having an annular rack 7 formed on itsouter periphery substantially throughout `its entire length. This sleeve 6 has a longitudinal cylindrical bore 8 formed eccentrically therein ,and in said bore is mounted' a bearingbar or tube y9 adaptedvto be rotatedy in the'bore for the purpose of adjustment and )locked therein sleeve 6 and' engage annularV grooves 11 formed in the periphery of the bearing bar. A spindle 12 extends through the bearing tube 9 and is journaled therein eccentric to the axis of the tube in ball bearings 13 suitably Xed in yeach end of the tube. The tube is closed by plates 14 screwed onto the ends of the tube. The ends of the spindle are reduced to 'form shoulders which abut against the housing of the ball-bearings so that longitudinal movement of the spindle relatively to the bearing tube is prevented.

The sleeve 6 is raised and lowered.` in the housing 1 by means of agear 15 projecting through the side of the housing and engaging the annular rack 7. Said gear is journaled in an arm 16 formed on thehousing, and meshes with a worm" 17 fixed on a horizontal` shaft' 18 journaled in a bearing 19 formed' in the upwardly turned end of the arm 16. On the shaft 18 is rotatably mounted a worm gear 20 having a clutch face 21 on onel side adapted'to be engaged by a clutch face22 formed on the side of a. clutch member 23 which is connected to said shaft by a feather 24 to permitaxial movement of the member thereon. For the purpose of rotating the shaft 18 by hand to bring the sleeve into operative position, said shaft has a squared end portion 25 for the reception-of a crank 26, (Fig. 2) When the, machine is in operation,the shaft is driven from an electric motor and is connected by the clutch member 23 to the worm gear 20, the` latter being driven `by a worm 27 on oneY end of a shaft-28. The latter is mounted transverselyv'to the shaft 18,-in bearin,9;s.2$

(Fig. 3) formed in a bracket 30 which is connected to the top of'ibearing 19 by bolts 31. On the other end of shaft 28 is' fixed a worm gear 32 2) meshing witha worm 33 fixed on a Vpower shaft 34 whichA Patented Jan. 25, 1916. Application led April 9, 1915. Serial No. 20,212. v

'by screws 10 which project through the is journaled in a bearing 35 on the outer end of the bracket 30. This power shaft extends parallel 'to shaft 18 through a casing 36 connected by bolts 36 to the upper part of the housing 1. This casing provides additional journals for the shaft 34 which is connected at its other end by a exible coupling 37 to the shaft of an electric motor 38 which is mounted on a support 39 detachably connected to a horizontal arm 40 extending outw-ard from the housing 1. Rotation of the sleeve 6, (and -by 1t a revolution of thetube 9 and spindle 12) is im parted fromvthe shaft 34 by means of a worm 41,k iixed on the latter between its ends, meshingv with a large horizontal worm gear 42, which surrounds the sleeve 6 and is so connected to the latter as to permit longitudinal or axial movement of the sleeve. The

gear 42 isrotatably mounted on the housing by means of its downwardly projecting hub 43 which is seated in an annular recess formed in the upper end of the housing. ,To prevent axial displacement of the gear, itis connectedv to the housing by a divided ring 44, secured to the side of the housing by screws 45 and having a horizontal flange taking into a groove formed in the periphery :of the hub 43.

The connection between the gear 42 and sleeve 6 consists of a key or featherv 46 on the interior of the hub 43 taking into a keyway 47 formed through the teethl 7 longitudinally of the sleeve. This connection permits a free longitudinal movement of the sleeve through the gear and Vprevents relative rotation Ibetween the sleeve and gear.

'A grinding disk 48 is detachably fixed, by

-. any suitable means, on the lower end of the spindle 12. l As above stated,\the spindleis Ieccentric to theaxis of the bearing tube 9,

is eccentrically and adjustablyy which mounted in the sleeve 6. For the purpose of rotating the bearing tube in the sleeve, to vary the degree of eccentricity ofthe spindle relative'to the aXisofthe sleeve, the top end plate -14 of the bearing tube is provided with 'holes 49 adapted to receive a well known form of spanner wrench. When the bearing tube has lbeen so positioned that the grinding disk will engage the wall of the cylinder tobe ground, said tube is locked readily ascertained. As the motor 50 re-- vJolves around the axis of sleeve 6 and moves up and down with the latter, acurrentcolthe cylinder,

lector adapted t0 partake of these, movements isprovided to supply current tothe motor. e disk 55, (Figs. 5 and ,7) adapted Kto be connected by screws to the rotating elements of the motor, said disk having a central contact plate 56 and an annular contact plate 57 This collector consists of a ber 'l surrounding the latter.v Lead wires --(not v shown) are connected, by binding screws.58, to these contacts and pass through holes 59 to the motor. vThe liber disk rotates in a,

cover 60 to which it is connected by an antifriction coupling vconsisting of' balls 61 mounted in grooves 62, 63, formed respec- I tively inthe outer periphery of the disk 55 and .in the side of thekcover 60, the balls being introduced into the groovesthrougha hole in `the cover closed by a screw 64.

While the cover is free to revolve withthe motor, it is prevented from rotating with the disk by an arm 65 projecting from the cover and reciprocably connected by a bearing 66 to a standard 67 mounted on the cover of the gear-casing 36. The cover 60 carriescontact brushes68 yieldingly connected to binding posts 69 and resting on the contacts 56, 57,

said brushes and posts being insulated `from the cove by bushings 70.

In Fi 4I have illustrated a convenient means for accurately centering .the base 2 on the engine cylinder to be ground. The base 2 is placed on top of the engine cylinder 71 and a'second cylinder, havinga cylindrical portion 72 of substantially the same diameter as the base, and a conical end portion 73,

is inserted in the baseland pushed intofthe.. enginecvlinder until the end 7 3 engages the bore of the latter at a points. The base is then securely fastened onto the engine cylinderI by passing bolts 74 through the bolt holes of the cylinder and throughelongated slots 75 formed in the lower flange 76 of the base. The centering cylinder is then removed and the housing 1 centeredv on the base by means of the male and female ianges 3 and 4 of the housing and base.

Before the grinding operation is started, the worm gear 20 isdisconnected from the shaft'lS by, moving the clutch member outiof engagementv with said gear. vThe shaft 18' is then rotated by ineans of the crank 26-to actuate the gear 15 to lower the cylindrical rack 7 into position for positioning the grinding disk 48 at the top of-'the engine cyllnder. The bea-ring tube 9y is rotated in the sleeve 6 until ,the disk 48 contacts vvith the y' rotation being vbrought aboutby first loosenin the screwslO when the tube maybe rotate 'by a Spanner-wrench placed in the holes49 lin the top plate 14.

locked to the sleeve 6, and thefgear 20 locked to the shaft 181 Simultaneous revplution and longitudinalmovement of the sleevdG 1s effected from the shaft 34, the worm" 41 12s. When the parts are in positipn, the vtube is '1,169,231' l ai thereon meshing with the teethof gear 42, the worm 3340i said shaft meshing with Worm gear 32 on, shaft 28, lWormv 27 on the latter meshing with gear 20 which is now locked to `shaft 18, the Worm 17 of ywhich engages gear 15.

The spindle `12 is rotated, during itsrev- 'olution and longitudinal movement, by the electric motor 50 Which may be vdriven at any desired speed. If itis desirable, for

any reason, to stop lthe longitudinalfeed,

this can be doneby simply moving the.

v 'clutch member 23 out of engagement with the lgear 2Q. A

I claim* `1. In a machine for grinding cylinders, a

cylindricalhousing, a cylindrical member therein, means'to rotate the member, means l spindle mounted in said member and mov- -to simultaneously 0r independently feed the member longitudinally, a grinding wheel able'therewith, means to adjust the spindle parallel to ,theaxis'of'said'memberg and inf dependent means for rotating the spindle.

2. Ina machine for grinding cylinders, a cylindrical housing, a cylindrical, member therein, means `to rotate the member,fmeai1sl to automatically continuously feed the -lati spindle movable therewith and vmeansl for .adjusting the eccentricity of the spindle and 3. In a machine for grinding cylinders, a

cylindrical housing, afcylindrical member mountdmherein, means to rotate the memf ber, means to simultaneously or independ ently feed the member v longitudinally, a grinding wheel spindle mounted eccentrically in saidmmember and movable therewith, independent means 'for rotating the its rotating meanswith respect to the cylindrical member. p y et. In a machine for grinding cylinders, a

cylindrical housing, a cylindrical member rotatable and longitudinally'movable inthe housing, a bearin tube vmounted eccentrically in the cylin rical member and mova- "ble therewith, a ygrinding wheel spindle journaledeccentrically in the bearing tube and lmovable therewith, means'for rotatingy the cylindrical member, means to move the latter longitudinally, and means to rotate the spindle.V n

5. In a machine` for grinding cylinders, a cylindrical housing, ,a cylindrical member V rotatable and'longitudinally movable in the housing, a bearing tube mounted eccentrically intheA cylindrical member and movable therewith, a *grinding :wheel spindle jour- `naled eccentrically in the bearing tube and movable'therewith, 4means for rotating the cylindrical member, means to move the latter longitudinally, means to connect the rotating and moving means, and means to rotate the spindle.

6. In a machine for grinding'cylinders, a

cylindrical housing, a cylindrical racl -rotatable andlongitudinally movable inthe eccentricallyin the rack, meansJ to lock the tube in the latter, a grinding wheel spindle journaled eccentrically in the tube and held against longitudinal movement relative thereto, means for rotating the rack, independent means for longitudinally moving the latter, means to connect the rotating means to Ythe moving means, and'independ`4 ent means for rotating the spindle.

7. In a machine for grinding cylinders, a cylindrical housing, a cylindrical rack rotatable therein, a gear surrounding `the rack,

"housing, a bearing tube' adjustably mounted means connecting the gear and rack adapted to permit the latter to move axially of the gearl and" vto prevent independent relative rotation of said rack and gear, means to rotate the latter, independent means for axiallymoving the rack, means to connect the cylindrical rack and axially movable by the latter, and means to rotate the spindle.

v8. In a machine forgrinding cylinders, a

frotating and moving means, a grinding wheel spindle eccentricallyjournaled in the cylindrical housing, a'cylindrical rack rotai table therein, a gear surrounding the rack,`

meansconnecting the gear and rack adapted .to Ipermit the latter to move axially ofthe gear and to prevent independent relative rotation of said rack andgear, means for4 axially moving .the rack throughthe gear, l

means for rotating the gear adapted to actuate` the moving means, and an electric motorv 4carried by, the cylindricall rackadapted to rotate the spindle.

9. In a machine for grinding cylinders, a Y A cylindrical housing, a cylindrical'rack` rotatable therein, a gear surrounding the-rack adapted to rotate the latter, means to move the rack through the. gear during rotation of the gear, a bearing tube mounted eccentrically. in and movable with the rack, a grinding wheel spindle journaled eccentrically in the tube and axially movable with the latter, an electric motor mountedl on the tube,'and a flexible coupling connecting the motor and spindle.

10. In a machine for grindlng cylinders, a cylindrical housing, a cylindrical rackrotatable therein, a gear engaging the rack adapted toraise and lowerthe latter, a Worm shaft for driving the gear, a gear loose/ on thershaft, means to clutch the loosegear to the shaft, an electric motor, a power shaft connectedl to the vmotor shaft, gearing connecting the power shaft to the loose gear,

means for. rotating the rack, a grinding Y wheel-spindle eccentrically mountedin the latter' and movable longitudinally thereby,

fand means for rotatingthe spindle.

e 11. In'. a machine for'gxgiding cylinders,l

a cylindrical housing, a, cylindrical rack ro- Y tatable therein, a gear engaging the rack adapted to raise and lower the"1atter,a'worm shaft for driving the gear, a gear loose on the shaft, means .to Iclutch theloose gear to" the shaft, anelectric-v-moton a power shaft', i flexibly lconnected to `the'motor shaft, gear- 'ing conn'ectn l'the power 'shaft to the loose gear, means or rotating the rack, 'a grind-1` ing wheel spindle ccentrically mounted inA the latter v andfmovable longitudinally thereby, and lmeans 'carried by adapted to raise and lower the latter, a worm shaft for vdriving the,gear, a gearjloose on the.`shaft,jmeans to clutch theloose gear to the 'cylindriJ 'cal rack for rotating vthe spindle.- Q 12. In a machinegfor grinding cylinders,

a'lcylindrical housing, a cylindrical rack ro,

tatable therein, a gear engaging' therack v the shaft, anelectric a power'shaft flexibly connected to the motorfshait, gearing connecting the powershaft tothe loose "a connectionibetweenthe drivingv gear and rack adapted; to rotate the latter. and permit axial movement thereofiindependent of the v, [driving gear, a; worm ,on 1 the-,power shaft 'iin mesh'with. the driving gear, aA bearing tubemounted eccentrically :the rack, -a

trically in the tube and.axially movable Awith 'lastfunamed motor-"to theV s pmdler: v e

In testimony that claim the foregoingA as Amy invention, -I have signed-my name,"in pres'enceii'of two subscribing witnesses.;

- gear-, a driving surrounding the rack,A v

grindingy wheel" spindle journaledv eccenthe latter, an,electric'inotor'mounted onthe v tube, and allexible coupling connecting the 

